DIERKS
SubstationArkansas · SOUTHWESTERN ELECTRIC POWER CO
At a glance
DIERKS is an electric transmission substation in Arkansas, on SOUTHWESTERN ELECTRIC POWER CO's transmission network. It is classified as distribution (69–115 kv) and connects 3 transmission lines. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #125027 | 69 kV | SOUTHWESTERN ELECTRIC POWER CO | IN SERVICE | 1.3 mi |
| #128618 | 69 kV | SOUTHWESTERN ELECTRIC POWER CO | IN SERVICE | 1.8 mi |
| #139931 | 69 kV | SOUTHWESTERN ELECTRIC POWER CO | IN SERVICE | 1.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of DIERKS, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| OZ Howard | Greenfield | AR | Howard | — | — | 4.3 yrs | 62.4 |
| EC FFE Hempstead County | Greenfield | AR | Hempstead County | — | — | 4.3 yrs | 61.9 |
| UNKNOWN108045 | Substation-Adjacent | AR | Hempstead County | 115 kV | 100 MW | 4.3 yrs | 59.9 |
| TAP150156 | Substation-Adjacent | AR | Hempstead County | 115 kV | 100 MW | 4.3 yrs | 59.9 |
| OKAY | Substation-Adjacent | AR | Hempstead County | 138 kV | 100 MW | 4.3 yrs | 59.3 |
| UNKNOWN108057 | Substation-Adjacent | AR | Howard County | 138 kV | 100 MW | 4.3 yrs | 58.6 |
| EC FFE Sevier County | Greenfield | AR | Sevier County | — | — | 4.3 yrs | 58.0 |
| EC FFE Howard County | Greenfield | AR | Howard County | — | — | 4.3 yrs | 57.9 |
How does DIERKS compare with other substations in Arkansas?
Arkansas has 1,025 substation records in HIFLD, of which 174 carry a station name; the rest are unnamed tap points, risers and line ends. 36 named substations in the state are in DIERKS's 69–114 kV band (21% of named stations). 126 sit in a higher band. 17 named substations in Arkansas operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 161 kV.
Who owns the transmission lines at DIERKS?
The 3 connected lines listed above are owned by SOUTHWESTERN ELECTRIC POWER CO. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 4.5 miles.
How do candidate sites near DIERKS score?
The 8 highest-scoring candidate sites within about 25 miles range from 58 to 62 on the 0–100 DC Readiness scale. They fall in Howard, Hempstead County, Howard County, Sevier County. The Arkansas average across 1,651 scored sites is 53.6. 758 of those Arkansas sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is DIERKS substation?
DIERKS has a maximum voltage of 69 kV. That places it in the 69–114 kV band. The median named US substation in this dataset is 115 kV, so DIERKS is below the national midpoint.
How many transmission lines connect to DIERKS substation?
3 transmission lines terminate at or pass through DIERKS in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 4.5 miles.
Who owns DIERKS substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at DIERKS belong to SOUTHWESTERN ELECTRIC POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is DIERKS substation located?
DIERKS is in Arkansas at 34.1199, -94.0118. The datacenter candidate sites closest to it are in Howard, Hempstead County, Howard County.
Are there datacenter candidate sites near DIERKS substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of DIERKS. The highest-scoring is OZ Howard at 62/100. Across Arkansas, the average DC Readiness score is 53.6.
Other 69 kV substations in Arkansas
- STATE LINE· 4 lines
- BLOOMBURG M.P.· 3 lines
- F.M. COCHRAN· 3 lines
- GREENLAND· 3 lines
- SOUTH TEXA.· 3 lines
- WALDRON· 3 lines
- ARCH SMITH· 2 lines
- ASHDOWN 69· 2 lines
- All named substations in Arkansas· 174 stations
- Datacenter candidate sites in Arkansas· 1,651 sites
- Brownfield and retired plant sites in Arkansas
- Substations by state
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “DIERKS substation, Arkansas”, https://gridcensus.com/substations/arkansas/dierks-bd03ae45 (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
Every site and score for DIERKS substation, Arkansas is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.